[OPENMP] Fix for http://llvm.org/PR24674: assertion failed and and abort trap

Fix processing of shared variables with reference types in OpenMP constructs. Previously, if the variable was not marked in one of the private clauses, the reference to this variable was emitted incorrectly and caused an assertion later.

llvm-svn: 246846

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index b5e7db53508..0e87c3844ba 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -383,6 +383,12 @@ void CodeGenFunction::EmitOMPLastprivateClauseFinal(
           auto *OriginalAddr = GetAddrOfLocalVar(DestVD);
           // Get the address of the private variable.
           auto *PrivateAddr = GetAddrOfLocalVar(PrivateVD);
+          if (PrivateVD->getType()->isReferenceType())
+            PrivateAddr =
+                EmitLoadOfLValue(MakeNaturalAlignAddrLValue(
+                                     PrivateAddr, PrivateVD->getType()),
+                                 (*IRef)->getExprLoc())
+                    .getScalarVal();
           EmitOMPCopy(*this, Type, OriginalAddr, PrivateAddr, DestVD, SrcVD,
                       AssignOp);
         }